Outboard engine construction



Aug. 10, 1943 T. JACKSON I OUTBOARD ENGINE CONSTRUCTION Filed Jan. 31,1942 6 Sheets- Sheet 1 INVENT OR.

Filed Jan. 31, 1942 6 Sheets-Sheet 2 N WA Aug. 10, 1943.

r. JACKSON OUTBOARD ENGINE CONSTRUCTION 1942 6 Sheets-Sheet 3 Filed Jan.31

, IN YENTOR.

rr /zma%kscn Hut/wet Au 10, 1943. JACKSO N 2,326,224

OUTBOARD ENGINE CONSTRUCTION Filed Jan. 31, 1942 S-Sheets-Sheet 4INVENTOR.

Aug. 10, 1943. Y T. JACKSON OUTBOARD ENGINE CONSTRUCTION 6 Sheets-Sheet5 Filed Jan. 31, 1942 INVENTOR flttornez 1943- T. JACKSON OUTBOARDENGINE CONSTRUCTION Filed Jan. 31, 1942 6 Sheets-Sheet 6 Patented Aug.'10, I943 V oU'ri oA'nniniyGIN colts imi ma 1 Thomas Jackson, NorthMuskegbnfMich a r signor to Continental Motors CorporatiomDei J I .vtroit, Mich, a corporation ofVirginia i 7 Application ante-r 31,1942',sria1-N 429,021, a fiClainis. (o1. 115-17) T invention relates tofan outboard-internal V combustion engine and more particularly to thata type which emb'odies a plurality of horizontally opposed enginecylinders and whichdrives a rearwardly extending relatively longpropeller shaft that is' preferably coaxially aligned with. the enginecrankshaft; r

I Many-difiiculties have been encountered :in

general type,-and more particularly many diffitail pipe construction andthecombination, of allthese elements in a unitconstruction particu-L ilarly serviceable ,foriapplication with relatively 9 large marinevessels capable of; conveying a heavy cargo,- The' presentjiconstructionis more} par-,- ticularly adaptable for application vwith-.astorrn boat;that is, a boat usediby theiarmy primarily for transporting troops andmunitions of war" through shallow water asflwell as:acrossmediu n sizedbodies of water such as lakes and rivers.

induction manifold cooperating with, a fuel in? ,iector pump to providean assembly particularly applicable with anwutboar'd'internalIcombustionengine' of the characterldescribed.

. ,g'Another'phase ofmy inventionrelates to thecoolingsystem for an:air' cooled internal com. hustion' engine, and has for-itsobje'ct theC011? struetion of an improved engine of the aforesaid' type byproviding Iefiicient" means for distribut 'ing cooling air to'the'engine cylinders'and mo're the construction of an outboard engine ofthis; 1

' culties were had with the development; of the I induction system, thecooling system and the board internal combustion'engine asviewed tromleral, the cons tructionjof theflengine induction @systmng Y J Y Eig.7,is a fragmentary plan 1 iew thereof,

particularly for-circulating cooling air uniformlyover a" plurality'ofhorizontally opposed engine cylinders, said objects beingmoreparticularly, accomplished lay-means which control thecirculation ofvcooli'ng' air and direct same, to "flow 7 around theenginecylindersinlsuch' a way'as to provide a cooling systemparticularly. applicable withan outboard internal combustion enginelofthe character described. J

, Another phase offmy' invention isxrelate'd to the tail pipeconstruction' and itsgassembly with the engine s'tructure; and has forits object the] V eonstructionof atailpipe structurepermanently V M edon united ,to theaengine' structure] itoillustrating{somewhatdiagrammatically the unit structuregwhich embodies an,.-en inestructure" andan attached tail piperstructure as assem bled 'in 7 Wtatey the constructionpf 'lfle-SllllifiblG f llnit." structureparticularlyfapplicable'forlanoutboard internal cornbustionenginef oithe character denarinevesselili; a V V For, a more.detailedunderstanding of my 1113K vention, reference may name to the ac comling-the engine cooling system, 7 I

Fig. 5 isia fraginentaryplan View bran e n'gin of: the type describedand the cooling system p Fig}; 6 is a fragmentary si' the tail-pipestructure,-

is found-to be particularly'applicalbleffor useasu 1 prisesinf general,a crankase lili havi engine'cylinder having ajcylinderfhe d; 3

' scribed, Qmb'i'e specifically) this" tail pipe struc;

ture providesan improved propeller shaftjihav -f V ing characteristicsparticularlyi applicable for ing tail pipef structure cooperating withthe en -jif ine to provide a unitarystructure of improved 1 M d chalc at r' s to prcvijqeia structure wh'ich'isreadily.transportedlandportf, rably-assembled with a storm'bo'ator other similar I panyingdrawingsillustrating various important 4 features embodiedinmy'inventionandjdefined in'the appended"claima 'whereinlikemharactersrefer tolike parts throughout the drawings, and 7' inwhichr Y Fig; 1515a" ,nd evaibna;awrtraae F a Fig.2 is a side"elevationalview thereof,; 7

Fig.3 is atransversesectional View illustrate;

Fig lQis a fragmentary 'detai-lview ilustrating I the assembled air;cooling'system ior an'en'gine; of the type, des'cribedandshowingparts-thereot' in section,

embodiedftherewith,

e elevational I view or; .7 v

Fig; 1 1 isa diagraniniatic "sideelevationalvi'e Figs. 8; 9 and 10 aredetailsectional views takfenaji a -storm boat or other-similarmar ne Vvessel. 7 The internal combustion engine illustrated in the accompanyingdrawings'is ofa type which? rality of horizontally-opposed enginecyl TS:H 'c twqted; withi a l ypeo in fin T I e portions 11, these lateralconducting portions ex tendinggenerally upwardly from the air inlet '16and turrree' atii s te 'lnergefwitl'i tliclongitu v dinally extertdingintake n anifold .-eenducti-ng l0 portions l9; A

cylinder structure and connctediwith' the cyll inder intakeports l4. 7

' ture is a fuel injector uns-2i" 'wh'feiiis pro:

seen"peat:meter-1'51?sums 6 r-tgieenginj-wrie'mmlq edm eboa mitytimeinstrument-panel sts structure and a hrack et 23 is alsosecured-there}- o? whi h: ibri tf ne 1 sense tfiepie'ileraineuntstqvmamtam H 7; t sired uniiormrz ixture,mayme hadgjltfl illbe VThe'engine 'as describe -herein is particularly j applicable for usewith a stei'm boat or other f niai'ine "Vessel; and" it will" 1 "engine"ylinaeris; aie si provided with intake port ineans M, An engineinduction system; I5 is assembled with said en-l gineand consistsof anintake; manifold struc- ;ture which is generally U-shaped inplan and'isprovided with a valvedjair inlet; l6 from'which lead the oppositelyextending lateral conducting Individual port runnerslfl are connectedwiththe longitudinal conducting portion L9 andlwith I the individualenginecylinders;"tliesepoiFriiffi ners' being fastened or otherwiseise'cured te 'tlie Mounted on the-rear face'loi enginelstrue -l yidedwith a plurality of outlet portionsvzt fito gg which are connected fuellines these fuel lines c5 striict'ed Canaries-name were a a e? ably tdthe; I en'gme ase "a d i serves to support the'flfront? end t well befun sets-army 4 n v piii'ififdfiallt "increased 1 as; the" fuel ch sfrge13- m creased. The 1 ndfuel are" thus icontrolled i3 there I k immediateusems' 'mxtui s t s6 positioned; asito echanees nf aiiy f hieiet 'air or'water -its into the ,erigineintalee. (1

mews-e that the into thefiywheel honsing through the air inlet 45 anddischargedthrough the outlets 46 and 46a.- The outlet 46 is connectedwith a box 41 enclosing one bank of engine cylinders while theoutletofqifia is connected with a box 'la'enclosin; the other bank. ofengine cylinderstwhich are oppositely extended from the engine crankcase10 with respect to the cylinders enclosed in boxviqacketzflny k v 1 .7These cylinder boxes oriackets openingemhich encircles the cylindersadjacent A'bdlflffl serves to olamp these boxes or cylinder jackets totheengine cylinders and said bolt clarnpstlieintermediate partitionmember 5531;; such a way as to provide forfair out-letsfifi'assofciatedirespectively with each" enginecylinderi 'Ihii's theco'oling air is circulated over the en gine cylinde'rs" and; thence'dewnwardiy- ;around the-engine cylinders and exhausted. be'lew the:

engine cylinders, the jackethaving sueh-a com structio'rr" as to providebafflin" musing; whichj ls iqcated adje cenf;-"-theirear end -oi th'internaL Jconi-hustmn immersed in the watezf' wherr installed in..thestorm boatr In'Fis l-li it will be-"ohserved that 7 the (outboard engineassembly iis mounted by piv- 'jaeenty the stern of theboati- Thetype ofboat "with whicn'my engineis esp'eciailrfi"suited; is the isrecessedao'r stepped ii order to providea iwell Brat-thesternzl- Whenthe tail piece" is: dropped in ithe water byi raising :{the iengineabout the f pi'vot 'lil!,'-' by me ns-par 1 the handle 39;th'e water 7is 'spylalshevfi against thelower half "of the I fly whee? hon-sing; andfqlf. this reason the lower hizlfzof th: mousing; and; preferably morethan a; half therof-vi's closed? or otherwise sealed so' that nolwatercaneget intothe flywheel housing;

- l'heinlet openingszfi is provided in the upper r tic'ularly-"loatedin"'the' frustroeconica'l"portion ,65o: the: flywheel housing. Thepropeller- "shaft at tih'and ispositionednficenterso that the pro-' jpellet 'sliaft 68 "extends; longitudinally through the-'lower -portionof thei'propeller shafthousing;

thatfen'dyof the-propellerfsliaft housing adjacent to the/flywhe'elliousingihavingta'partition '69: providedwith an opening it throiigh"which the propeller shaft "extends; The intake-opening 45 means radiallyextending fins 'l" l "secured to the flywheel ho'using andtothipropeller shaft housing asiclearly il1ustratedin Figs.-' 3 and 4.}.l The propeller shaft 'housin'gis', generally re ferred to as the tailpipe andi'this housing is pro-v Vidd"ori itsfside withihandles 'll andissecured to the? plane structure-flaiat its rear end," whichplanestructurepreferably extends obliquely to thei'axisiof "the:propeller shaft; housing-land is j;

welded? thereto-.1 The; plane structure. 13- has weld'ed hereto alongitndinally; extending;'cenv tral tii nel :14; Ajpipe jstructurehaving-forked i ture 13.

, V I 2,326,224 exhaust gasinlets 15a; is p ositioned to extendlongitudinally of the propeller shaft housing andis supportedby brackets75, suitable connections connecting this pipe with the exhaust pipes 25of the engine, the exhaust. from both banks of cylinders thus convergingand flowing through ption wall substantially-closing the end of thehaving afrustro-conical. rearwardly ext ending 3 portion merging withand secured to the forward 7 l.-

end of saidpropeller shaft housing, said propeller shaft housingprovided, with aatransverse-parti propeller shafthousing adjacent tosaid flywheel the pipe '55, this pipe being openly connected with thetunnel m as at 11 mtg which theex haust gases are discharged. The planestructure 13 is provided with a"discharge opening :18

tailpipe structure is further provided witha verdiate portionisconstructed to support the propeller shaft 68. These complementary-finpershielded by a bafilei'lii in order that the exhaust gases may bethusexhausted underwater. -The tions are formed with longitudinal channels83 I through which the propeller shaft extends, and 1; adjacent the rearedge thereof 'a resilient bushing 84 is mounted to support the'propellershaft.

The upper edge of the fin structure as .is pro-' vided with oppositelyextending flanges 85 which are welded to theunderside of the plane strucThe entire tail pipe structure is constructed of sheet metal stampingsand tubular sections,

said elements preferably being permanently V unitedtogether bywelding inorder to form a' relatively light weightrigid tail pipe structure,

that is readily secured to the engine structure to form a unitconstruction; l I

It will plainly be seen'that I have provided an improved assemblyembodying novel features of construction which result in theconstruction of a serviceable and practical outboard motor assembly, onewhich may be readily handled and which serves as a portable unit ofparticular thevunderside"surface.of saidplane structurej I f directlydriven byi said crankshaitan'd comprisutility'in connection withpowering storm boats and other marine vessels. 7 p r It'will be apparentthat; although I-have described various'features of my construction indetail, and have elaborated on the various iconstructions and the mannerinwhich samei are' the scope of the'appended claims:

@Iclaim: a a v; V '1. In an outboard-engine assembly, anfenginecrankshaft; a flywheel directlydriveni by said crankshaft, a flywheelhousing secured to the en-- *gine structure,and a tail piece assemblycompris fjing a propeller shaft tubular housing -'secure d directly tosaid flywheel 1 housing, apropeller shaft extending longitudinallyrearwardly of said engine and axially alignedwith the engine crankshaft,saidpropeller shaft tubular-housing axially positioned slightly offvcenter relative to axis of said propellersha'ftand flywheel housingassembled, in'some detail, it will befobviousto 'those'skilled in theart to which myfinvention pertains that various modifications andchanges I .jmay be made therein without departing :from

whereby to house-the propeller shaft substantial- T 2., In an outboardly the lower interior portionio'f said propeller' shaft housing. f fengine assembly,':an engine;v

' crankshaft, a propellerishaft directly driverrby I the crankshaft andextending 'co'axiallyrthere with, a flywheel housing secured'totheengine Y structure, and a tail piece; assembly comprising i apropellershaft tubular housingsecured' direct -v ly to said flywheelhousing, said-flywheel housing {'haust gas outlet"openingicommunicatingwith 3 {said tunnel to; exhaust the gasjunder water.

underneath the plane structure."

shaft housing, a planestructure-secured to "the rear end of said housingand inclined obliquely said vertical fin comprising a pair of vertically'an'd provided withbearingmeam supporting the;

having outwardly extending flanges alongfthei'rtop edges welded to thevunderside surface of-sa id plane structure, said plates havingcomplementary longitudinally extern'iing':clianniels cooperat A ing to?provide a propeller shaftfenclosurer andv icarryinga propellr'shaftvbearing c an outboard internal' combustion engine Shavingacrankshaftand a coaxial propeller rectly driven bys'aid crankshaft and1a tubularpropeller shaft housing', ar plane-struci ture, secured tothe'rear enjd of saidghousing and;

inclined obliquely to the housing -.axis,;a sheet metal vertical finsecured to 'said plane structur and provided with hearing meanssupporting the fsheetmetal stamping folded alongits centereline.to'proyide a pair of, vertically extending sheet metal platesihavingfoutwardlgil extending flan es "along" theirff'topi. edges" welded) tothe underside channels cooperating .to' provideja propeller shaft"having van peni-Vng j-f 1 nuts lowr'llalf l o tion through which thepro- Fe er shaft is'extended. a 7

3 A propeller shaft tailpieceassemblyffor an. V

-outboard' internal combustion engine havingla' crankshaft, a propeller,shaft driven "by said,

crankshaft, and comprising a'tubular propeller and an engine exhaust gastunnel secured on the top side of" said plane structure and terminating"at a point adjacent'the rear edge of said plane 7 structu1'e, said planestructure having; an 'ex- .4. A propeller shaft, tail pieceassemblyforian outboard internal combustion engine having 'a crankshaft;a propeller shaft' driven by: said crankshaft, and comprising atubularpropeller to the housingaxis, a sheet "metal vertical fin secured tosaid plane structure and provided with i I bearing means supporting-thepropeller shaft,

extending sheet metal: plates havingfoutwardly extending flanges alongtheir top edges welded to ing a tubular propeller shaft housing, .aplane" structure securedto the rear endof said'housing v V. and inclinedobliquely tothe h'ousing'axis;a'sheet v '1 metal vertical-finsecur'edtosaid planestructurepropeller shaft, said. :vertical -fin' comprising, apa r of vertically extending-*sheetm etal plates 6.}"A j propeller.Shaft tail (piece ts: 5

hg itid m isin propellershaft, said vertical fin comprisingla enclosurean d carrying 'a I resilient yielding" us ing for. supporting saidvpropeller shaft) 1 r a

